131623031 has 2 divisors, whose sum is σ = 131623032. Its totient is φ = 131623030.

The previous prime is 131623007. The next prime is 131623033. The reversal of 131623031 is 130326131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131623031 is a prime.

It is a super-2 number, since 2×131623031² = 34649244579253922, which contains 22 as substring.

Together with 131623033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131622994 and 131623012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131623033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65811515 + 65811516.

It is an arithmetic number, because the mean of its divisors is an integer number (65811516).

Almost surely, 2^131623031 is an apocalyptic number.

131623031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131623031 is an equidigital number, since it uses as much as digits as its factorization.

131623031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 131623031 is about 11472.7080935584. The cubic root of 131623031 is about 508.6791799550.

Adding to 131623031 its reverse (130326131), we get a palindrome (261949162).

The spelling of 131623031 in words is "one hundred thirty-one million, six hundred twenty-three thousand, thirty-one".